Mercari India Dev Meetup #02 Mobile

by mercari

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Presentation Title Subtitle

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We have a livestreaming on YouTube Feel free to leave questions on Q&A section Share on with #MercariIndia Event Information

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Today’s MC 🎙 Kayo Osumi Joined Mercari in 2018 to support 30 engineers onboarding from IIT. Employer Branding Mercari India from 2022. Before joining Mercari, I was working at Indian startup and lived in Gurgaon.

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＼ Let’s get started!／ Ice Break Do you know what is the meaning of Mercari??

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Mercari came from the Latin word meaning "trade" or "commerce"

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11:00-11:05: Open the virtual room 11:05-11:10: Welcome, Event outline & rules shared 11:10-11:20: Mercari India introduction by Mohan 11:20-: Engineering for Japan’s largest c2c Marketplace 1. Mostapha Baalbaki 2. Anton Krutko 3. Manoj Gubba 4. Abhinav Joshi Closing Remarks and open for Q&A Agenda

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Introduction of　 Mercari Head of Engineering, Mercari India Mohan.Bhatkar

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　　 What Is Mercari? 8

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　　 Mercari’s Strengths: Easy-to-Use  9 Escrow payment Mercari Shipping  AI Listing Barcode Listing  Mercari acts as a go-between in transactions to prevent disputes  - Flat-rate shipping across the country - No need to write addresses - Anonymous shipping  - Automatic data entry - Price suggestions  Seller Buyer Listing Payment notiﬁcation Buyer rating Balance Payment Seller rating Delivery

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　　 Company Overview Mercari Group is made up of Mercari, Inc., and its consolidated subsidiaries. 10 Established Activities Representative Locations Mercari, Inc. Established Activities Locations Ofﬁces Representative Representative of Mercari JP February 1, 2013 Planning, development, and operation of the Mercari marketplace app Roppongi Hills Mori Tower, 6-10-1 Roppongi, Minato-ku, Tokyo 106-6118, Japan Tokyo, Sendai, Fukuoka Shintaro Yamada Jeff LeBeau January 2014 Planning, development, and operation of the US version of Mercari John Lagerling Palo Alto, CA Mercari, Inc. （US） October 1, 1991 Management of a soccer club Fumiaki Koizumi Higashiyama 2887, Aō, Kashima, Ibaraki, Japan Kashima Antlers F.C. Co., Ltd. January 28, 2021 Planning, development, and management of internet services Yuki Ishikawa Souzoh, Inc. November 20, 2017 Financial-related businesses Masato Yamamoto Merpay, Inc. April 28, 2021 Cryptoasset- and blockchain-related services Naoki Aoyagi Mercoin, Inc. Merlogi, Inc. October 28, 2021 Planning, development, and management of logistics services Tomoyuki Shindo Japan Region

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• Mercari India Development Center (IDC) leveraging a plug and play model to enable business expansion and build new capabilities for Business growth • Through India, Mercari wants to create high quality service and wants to hire top talent as it believes India is a good place to start when it comes to technology talent • We started hiring outside the country in earnest in 2017, and in 2018 and 2019, we hired about 50 new graduates from IITs in India. Already have a lot of active Indian engineers in our company. • Mercari wishes to expand its product offerings and looking for global locations for their growth. Mercari launched India Center of Excellence! 11 Mercari India in Bangalore!!

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Mercari India core objective Expansion of Mercari Group's product development capability through global engineering excellence.

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Mercari India Team First Thinking The team is the most effective means of software delivery, not individuals. EM PM/TPM SWE/TL SWE SWE SWE SWE

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Mercari India Team First Thinking Building self sufficient teams to deliver customer/business value is the end goal. Forming ● Creating team plan with JR/US stakeholders ● Hiring team with JR/US stakeholders ● Establishing Mercari India HR, corporate, governance foundations Storming ● Onboarding members with JR/US stakeholders ● Establish process to work together between JR/US and India Norming ● Transitioning team to self suﬃcient mode ● Transferring ownership with equal purpose of work Performing ● Team functions on its own with full potential ● Team can scale without JR/US support ● Strong alignment with Mercari Group’s product/business/organiz ation roadmap

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Mercari India FY2023 plan Establish product development organization of ~50 size with scalable foundation.

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NOW HIRING: Software Engineer, Android / Software Engineer, ios

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Software Engineer, Android at Mercari India   17 ● Native Android app development for Mercari and group companies' apps ● Tech stack ○ Development language: Kotlin ○ Development environment: Android Studio ○ Build tool: Gradle ○ CI/CD： CircleCI ○ Others: GitHub, Firebase, Slack, Figma, JIRA, Conﬂuence ○ Architecture frameworks like MVVM, MVP, declarative UI, etc. https://careers.mercari.com/hello-india/

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Software Engineer, iOS at Mercari India   18 ● Native ios app development for Mercari and group companies' apps ● Tech stack ○ Development language: Swift ○ Libraries and frameworks : UI kit, Swift UI, etc. ○ Build tool: Bazle ○ Others: GitHub, Firebase, Slack, Figma, JIRA, Conﬂuence ○ Architecture frameworks like MVVM, MVP, declarative UI, etc. https://careers.mercari.com/hello-india/

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1 year story of Mercari India Please check out 1 year story of Mercari India and join us in this exciting journey !

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Presentation Mostapha Baalbaki Engineering Manager

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21 Strawberry Team Introduction 🍓 @mustafa

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30 Strawberry Team belongs to Camp Core Camp Core focuses on the core marketplace experience for our users (buyers and sellers)

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31 We are one camp… ONE team! The Camps exist to create a great product development environment, where global talent from across the world can work together in Mercari and create value for our customers. ● Empowerment ● Commitment ● Transparency ● Outcome ● #GoBold Accountable autonomy Safe environment ● Building a product is a marathon ● Sustainable speed ● Work-Life Balance ● Fail fast, Learn fast ● Diversity of thoughts

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33 Let me introduce the Software Engineers 󰗲 @wills Frontend @Drew Frontend @joehsieh iOS @Tomato Android @cont-k-ishikura iOS @Misha K Android @kowase iOS / Android @Sahil Frontend @atulsharma Android (intern) @Ishwar (Ishu) Android (intern)

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34 TPMs, QA, Designer and BI members 󰗲 @camy TPM @AJ TPM @danielg QA @Nori QA @alexander.liu QA @Masa Designer @Alisa Designer @Toshi Designer @Aggy UXR @Lingkeng BI

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35 Team daily standup bot (built by @kowase san)

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36 Team Building culture

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Presentation Anton Krutko Android Engineer

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Strawberry Team. Android Engineer perspective. @Tomato 🍅

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Software Engineer, Android Anton Krutko

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Making marketplace experience of our users better. 🎈 What do we do in Strawberry Team? Image by pikisuperstar

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Item Detail Domain? Checkout Notiﬁcations

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Tech Stack? ● Kotlin Only ● Jetpack Compose Only* ● MVVM/Clean Architecture** ● Dagger/Hilt ● Coroutines/Coroutines Flow ● JUnit4***, JUnit5 *Except things currently not supported by Compose **Self made, constantly evolving ***Robolectric "The Android robot is reproduced or modiﬁed from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License."

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Challenges? Challenge 1. Checkout On-Client calculation (🍰?) ● Mercari Points ● Docomo Points ● Mercari Funds ● Coupons ● Payment method fees ● Promotions ● Business driven logic and restrictions

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Challenges? ● Refactoring ● API ● Loading delays ● Error scenarios Challenge 2. Move everything to the backend (🍰?) API Refactoring ⚙ Coroutines to the rescue, but…

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Presentation Manoj Gubba Tech Lead, iOS

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46 Personalization Core Team (iOS) Introduction @manoj

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47 ● From Hyderabad ● Graduated from IIT Kharagpur in 2018 ● Joined Mercari as a New Grad ● Worked mostly on iOS apps ● Also worked with Flutter, iOT, embedded systems and Android ● Likes ○ Reading books 📚 ○ Playing games 🎮 Manoj Kumar Gubba  Software Engineer, iOS

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48 ● Responsible for bringing Personalization and Discovery features to the users. What do we do in Personalization core team?

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49 Meet my team Stouf Me Araki Joshi Vaibhav Xiaofan Romy Bharath Alex Curry

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50 Screens - Home Recommend Tab Topics Tab My list Tab

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51 Screens - Search

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52 iOS

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53 iOS Tech Stack ● 100% Swift ● SwiftUI ● Declarative Architecture ● Bazel build system ● CircleCI

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54 Some of the challenges we have tackled ● GroundUP ● Performance issues with SwiftUI ● Client logging systems ● Accessibility ● Localization ● Dark Mode

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55 Our team values ● Embrace Diversity ● Blameless culture ● Promote personal growth and development ● Adopt a data-driven behavior ● Eliminate bottlenecks, maintain a strong documentation and share knowledge ● Embrace automations

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56 - Hackweeks 󰝯 - Movie Nights 🍿 - Team lunches/dinners 🍾 - Club activities 🤓 - etc. Fun things we do

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Presentation Abhinav Joshi Android Engineer

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58 Personalization Core Team Introduction. Android Engineer Perspective @Joshi

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59 Software Engineer, Android Abhinav Joshi

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60 Making the user experience have a personal touch. 🫰 What do we do in Personalization Team? Image by macrovector

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61 Home Domain Home 🏡 & Search 🔎 Search Saved Search

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62 What do we use? Tech Stack? ● 100 % Kotlin ● Jetpack Compose ● Design System ● MVVM/Clean Architecture ● Dagger/Hilt ● Coroutines/Coroutines Flow ● JUnit4, JUnit5 "The Android robot is reproduced or modiﬁed from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License."

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63 Challenges? Technical Challenge. ● Create Scalable Component architecture for Home ● Complex view support with compose ● Good performance ● Multiple sequential and concurrent calls ● Tech Debt

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64 Challenges? ● Communication ● Blockers ● Conﬂict resolution ● Learning from past mistakes ● Scrum ceremonies ● Organization and Knowledge bank Soft skill challenges Image by pch.vector

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65 Meet my awesome team 🔥💯 Bharath Swamy Xiaofan Dai (Android Engineer) Manoj Gubba (iOS Engineer) Stephan (Engineer Manager) Atsushi Araki (iOS Engineer) Vaibhav Jain (Android Engineer) Romy (Frontend Engineer) Alexander (Backend Engineer)

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66 What do we do for fun? ● Hack Fest 👾 ● Club activities 🎭 ● Team buildings 🍻 ● Movie nights 🎥 ● Lunch and Learn 📚🍕